05.2006
Faults and Alarms
Siemens AG
6SE7087-2JD60
SIMOVERT MASTERDRIVES
Operating Instructions
14-13
Number / Fault
Cause
Counter-measure
F101
GRND UCE
During the ground fault test, the UCE
monitoring has responded in a phase in which
no valve has been triggered.
Check valves in the power section for short-
circuit, and on converters with fiber-optic
gating, check the gating unit wiring and the
UCE checkbacks for correct assignment.
R376 can be interrogated to indicate which
UCE monitoring has responded.
F102
GRND Phase
During the ground fault test, a current flows in
a phase in which no valve has been triggered
or the UCE monitoring has responded in the
phase in which the valve has been triggered.
The fault value can be read out from r949. The
digit of the xth position indicates the valve
where the fault occurred at power-up.
X O O O x = 1 = V+ x = 2 = V- x = 3 = U+
x = 4 = U- x = 5 = W+ x = 6 = W-
The figure of the xth digit indicates the phase
in which I is 0 and thus a valve must be
defective (always conductive).
O O O X x = 1 Phase 1 (U)
x = 3 = Phase 3 (W)
x = 4 = Phase 1 (U) or 3 (W)
Examine phase for defective valves (always
conductive).
F103
Ground fault
There is a ground fault or a fault in the power
section.
During the ground fault test, a current flows
from the phase in which a valve has been
triggered, the overcurrent comparator has
responded, or a UCE monitoring has
responded in a phase in which a valve has
been triggered.
Read out fault value from r949. The digit of the
xth position indicates the valve where the fault
occurred at power-up.
X O O O x = 1 = V+ x = 2 = V- x = 3 =U+
X O O O x = 4 = U- x = 5 = W+ x = 6 = W-
Check the motor including the feeder cable for
short-circuit. If no ground fault is present,
check the power section for defective valves
(always conductive).
The digit of the xth position indicates the
phase in which I is 0 and therefore a valve
must be defective (always conductive).
O O O X 1 = Current in phase 1 (U)
2 = UCE in phase 2 (V)
3 = Current in phase 3 (W)
4 = Only overcurrent occurred
The speed of the motor shaft during the
ground-fault test should be less than 10 % of
the rated speed!
1) In phase V there is a ground fault or a
defective valve or the "SAFE STOP" switch
(X9/5-6) is open (only for units with Order No.
...-11, ...-21, ...-31).
